Which of the hand valve configurations for the gauge manifold set is the correct set up for monitoring both the low and high system pressures? Illustration GS-RA-03

Illustration GS-RA-03: the U.S. Coast Guard has not released this illustration.

Question

Which of the hand valve configurations for the gauge manifold set is the correct set up for monitoring both the low and high system pressures? Illustration GS-RA-03

Illustration GS-RA-03: the U.S. Coast Guard has not released this illustration.

Accepted Answer

Option D: D. Proper manifold gauge operation requires both the low-pressure and high-pressure hand valves to be cracked open to monitor system operating pressures simultaneously without isolating the gauges from the service ports or bypassing refrigerant flow improperly.